Reference for Pesachim 82:9

או לא בשעה שאינו בקום אכול צלי ישנו בבל תאכל נא בשעה שישנו בקום אכול צלי אינו בבל תאכל נא

he disqualifies himself from [being one of] the members of his company. Another [Baraitha] taught: You might think that if he ate as much as an olive of semi-roast before nightfall he should be culpable; and it is a logical inference: if when he is subject to [the precept] 'arise and eat roas [flesh]',<span class="x" onmousemove="('comment',' I.e., perhaps a different argument is to be used.');">¹¹</span>

Jastrow